diff --git a/preseed_debian_12_cinnamon-core.txt b/preseed_debian_12_cinnamon-core.txt
index c742103..1b0c891 100644
--- a/preseed_debian_12_cinnamon-core.txt
+++ b/preseed_debian_12_cinnamon-core.txt
@@ -25,7 +25,9 @@ d-i partman/confirm_nooverwrite boolean false
 # Configuration de l'horloge système
 d-i clock-setup/utc boolean true
 d-i time/zone string Europe/Zurich
+d-i time/zone seen false
 d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 # Configuration APT : ne pas utiliser en priorité le CD-ROM comme source
 d-i apt-setup/cdrom/set-first boolean false
diff --git a/preseed_debian_12_cinnamon.txt b/preseed_debian_12_cinnamon.txt
index 594e366..9481fd3 100644
--- a/preseed_debian_12_cinnamon.txt
+++ b/preseed_debian_12_cinnamon.txt
@@ -25,7 +25,9 @@ d-i partman/confirm_nooverwrite boolean false
 # Configuration de l'horloge système
 d-i clock-setup/utc boolean true
 d-i time/zone string Europe/Zurich
+d-i time/zone seen false
 d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 # Configuration APT : ne pas utiliser en priorité le CD-ROM comme source
 d-i apt-setup/cdrom/set-first boolean false
diff --git a/preseed_debian_12_gnome-core.txt b/preseed_debian_12_gnome-core.txt
index ffee4bc..3c8069c 100644
--- a/preseed_debian_12_gnome-core.txt
+++ b/preseed_debian_12_gnome-core.txt
@@ -25,7 +25,9 @@ d-i partman/confirm_nooverwrite boolean false
 # Configuration de l'horloge système
 d-i clock-setup/utc boolean true
 d-i time/zone string Europe/Zurich
+d-i time/zone seen false
 d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 # Configuration APT : ne pas utiliser en priorité le CD-ROM comme source
 d-i apt-setup/cdrom/set-first boolean false
diff --git a/preseed_debian_12_gnome.txt b/preseed_debian_12_gnome.txt
index bb05ab4..f4b81b2 100644
--- a/preseed_debian_12_gnome.txt
+++ b/preseed_debian_12_gnome.txt
@@ -25,7 +25,9 @@ d-i partman/confirm_nooverwrite boolean false
 # Configuration de l'horloge système
 d-i clock-setup/utc boolean true
 d-i time/zone string Europe/Zurich
+d-i time/zone seen false
 d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 # Configuration APT : ne pas utiliser en priorité le CD-ROM comme source
 d-i apt-setup/cdrom/set-first boolean false
diff --git a/preseed_debian_12_plasma-desktop.txt b/preseed_debian_12_plasma-desktop.txt
index 6ab9bcf..d4a44d9 100644
--- a/preseed_debian_12_plasma-desktop.txt
+++ b/preseed_debian_12_plasma-desktop.txt
@@ -23,9 +23,11 @@ d-i partman/confirm boolean false
 d-i partman/confirm_nooverwrite boolean false
 
 # Configuration de l'horloge système
-d-i clock-setup/utc boolean false
+d-i clock-setup/utc boolean true
 d-i time/zone string Europe/Zurich
+d-i time/zone seen false
 d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 # Configuration APT : ne pas utiliser en priorité le CD-ROM comme source
 d-i apt-setup/cdrom/set-first boolean false
diff --git a/preseed_debian_12_standard_ssh.txt b/preseed_debian_12_standard_ssh.txt
index 4266c0d..133db0f 100644
--- a/preseed_debian_12_standard_ssh.txt
+++ b/preseed_debian_12_standard_ssh.txt
@@ -24,7 +24,9 @@ d-i passwd/make-user boolean false
 # Configuration de l'horloge système
 d-i clock-setup/utc boolean true
 d-i time/zone string Europe/Zurich
+d-i time/zone seen false
 d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 # Partitionnement automatique avec LVM
 d-i partman-auto/method string lvm
diff --git a/preseed_debian_12_standard_ssh_full_disk_encryption.txt b/preseed_debian_12_standard_ssh_full_disk_encryption.txt
index 5aa5373..b37fdec 100644
--- a/preseed_debian_12_standard_ssh_full_disk_encryption.txt
+++ b/preseed_debian_12_standard_ssh_full_disk_encryption.txt
@@ -26,9 +26,12 @@ d-i passwd/username string utilisateur
 d-i passwd/user-password password mot_de_passe_utilisateur
 d-i passwd/user-password-again password mot_de_passe_utilisateur
 
-### Fuseau horaire
-d-i time/zone string Europe/Zurich
+# Configuration de l'horloge système
 d-i clock-setup/utc boolean true
+d-i time/zone string Europe/Zurich
+d-i time/zone seen false
+d-i clock-setup/ntp boolean true
+d-i clock-setup/ntp seen false
 
 ### Partitionnement et chiffrement intégral
 d-i partman-auto/method string crypto